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Old 22 August 2008, 17:08   #1
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Tiny Tach Outboard Inquiry

Hola

Wrote the Tiny Tach Company asking what tach model they would recommend for use in 2 strokes 2 cylinder engines, they said the ICR Model coil wrapped on both plug wires, according to specs: 1CR Model: for single or twin cylinder engines with a spark firing every 180 degrees of the engine crankshaft. Was a 2 stroke engine supposed to fire 1 spark firing for every 360 one revolution of the crank shaft ? Or is correct a 2 strokes, 2 cylinder is firing every 180 of the crankshaft ? Other alternative : 2XLR for most multi cylinder outboards, no specs at all.

Have in use a Tiny Tach, think was erroneously purchased as reads double revs in idle, maybe is a IC and needs to be coil wrapped on both plug wires. The hour meter works ok. The R stands for resetable model.

http://www.tinytach.com/tinytach/gasoline.php

Which one do you think will work fine 1CR or 2 XLR, any clues, has somebody installed any of them ? in what model 2 stroke, 2 cylinder engine ?
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Old 22 August 2008, 18:21   #2
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parallel 2 cylinder 2 stroke is a 180 degree crank ie fires/sparks twice every revolution. You couldn't have a wasted spark setup on a 2 stroke.
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Old 23 August 2008, 01:09   #3
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Quote:
Originally Posted by Nos4r2 View Post
parallel 2 cylinder 2 stroke is a 180 degree crank ie fires/sparks twice every revolution. You couldn't have a wasted spark setup on a 2 stroke.
Thanks Nos4r2 for the tech explanation, one last inquiry. The guy from Tiny Tach Company said must wrap both plug wires. The tach comes factory delivered with about 10 cm of red cable which is the pick up signal cable, you are supposed to wrap it 4 complete turns and cut the remain portion and ground properly the white cable.

In a wrap both plug wires configuration, are you supposed to coil the second plug wire with the remain of the unused portion of the first wrapped plug wire, wrap it 4 complete turns and cut the left over, as you did on the first plug wire ? See previous posted pic to have the overall idea, what will be your thought.

Happy Sibbing
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Old 23 August 2008, 05:02   #4
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I don't see how you're getting 2x rpm if you've only got one plug wire wrapped unless you've got a TT226NR-4C or you're getting interference from the other HT lead. Might be worth trying foil wrapping your winding to try and stop it.
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Old 23 August 2008, 17:17   #5
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Tacho

I have on I bought on ebay, you just hold the button to change the modes P1, P2, P3

I just played arond with mine on a 60hp 2 stroke mercury, it was ok, I think on P1.

Also show highest revs etc........

Really useful to get the correct prop etc..........

Chris
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Old 03 September 2008, 17:33   #6
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Everyone asks about these but can't find an end result or conclusion anywhere .

Can you see them at speed ?,
Where have people mounted them ?

it also says they record the highest rpm recorded after each running of the engine which i guess could be useful to get the prop right if you can't see it .

I figure it could be 45 well spent on a tiller steer setup eeven if its only used to get the motor / prop tuned right .
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Old 04 September 2008, 03:58   #7
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you can also use this one - one fits for all kinds of motors
http://www.autonnicmanufacturing.com/Home.htm
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Old 04 September 2008, 12:34   #8
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Quote:
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you can also use this one - one fits for all kinds of motors
http://www.autonnicmanufacturing.com/Home.htm
Hola Ferdi

Do you know the actual cost on these small units in pounds-dollars ? Are all multipurpose tachs, or you have to order them by engine/work ? Sorry to say, but in my own personal experience, Tiny Tach are not very cooperative friendly people, don't answer your emails, when technical inquired to a related problem, just give unprecise info, one ends guessing about correct wiring tachs so to read properly. One's waist of time, incredible guys. So Autonnic would be a nice alternative, will check with them. Thanks for the imput.

About Ian's inquiry ; you can read them at speed, depends on where your Tiny Tach is attached to, could be in the front engine cowl, on top of the tiller, or in a Rib dash board. Have mine inside the engine attached to a screw as in pic from previous post. Only use them as hourmeter. Very useful for engine programed maintenances, have several unresetable/resetable/all purpose engine models. Nice for boat/engine propeller WOT fine tune adjustments (Reach max rpm for a given boat/engine configuration) Just $ 39.00 In USA + shipping.

Happy Sibbing
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Old 04 September 2008, 17:12   #9
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I got this reply back very quickly .


Quote:
Thank you for your enquiry.

The Tiny Tach Commercial CTT2 is suitable for your 3 cylinder outboard.

Apart from RPM to 20K and total hours it has 2 service reminders, trip hours
and will also show peak RPM for the last time the engine ran.

Price: 45 including postage and VAT.

The Pocket Tach has been replaced by the TT-20 which is a hand held
instrument for technicians to check RPM.

It can be used wireless or with cables connected to a HT lead and is
operator adjustable to all engine ignition systems.

Price: 60 including postage and VAT.

Payment may be made, by cheque against invoice, after receiving the unit(s).

Let us have your name and address, should you wish to proceed with an order,
and we will despatch by return.
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Old 05 September 2008, 07:50   #10
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Quote:
Originally Posted by Locozodiac View Post
Hola Ferdi

Do you know the actual cost on these small units in pounds-dollars ? Are all multipurpose tachs, or you have to order them by engine/work ? Sorry to say, but in my own personal experience, Tiny Tach are not very cooperative friendly people, don't answer your emails, when technical inquired to a related problem, just give unprecise info, one ends guessing about correct wiring tachs so to read properly. One's waist of time, incredible guys. So Autonnic would be a nice alternative, will check with them. Thanks for the imput.

About Ian's inquiry ; you can read them at speed, depends on where your Tiny Tach is attached to, could be in the front engine cowl, on top of the tiller, or in a Rib dash board. Have mine inside the engine attached to a screw as in pic from previous post. Only use them as hourmeter. Very useful for engine programed maintenances, have several unresetable/resetable/all purpose engine models. Nice for boat/engine propeller WOT fine tune adjustments (Reach max rpm for a given boat/engine configuration) Just $ 39.00 In USA + shipping.

Happy Sibbing

did you follow my link ?
everything described. prices in US$ .
1 ARM fits all motors regardless of zylinders and 2 or 4 stroke. some kind of fuzzy logic integrated.
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